Restart LLVM IR SSA generation

This is the third go and I'm going for it!
This commit is contained in:
gingerBill
2016-07-30 00:09:30 +01:00
parent 32ab8fcf99
commit 776dc0e8f1
20 changed files with 1843 additions and 507 deletions

318
src/codegen/codegen.cpp Normal file
View File

@@ -0,0 +1,318 @@
#include "ssa.cpp"
#include "print.cpp"
struct ssaGen {
ssaModule module;
gbFile output_file;
};
b32 ssa_gen_init(ssaGen *s, Checker *c) {
if (c->error_collector.count != 0)
return false;
gb_for_array(i, c->parser->files) {
AstFile *f = &c->parser->files[i];
if (f->error_collector.count != 0)
return false;
if (f->tokenizer.error_count != 0)
return false;
}
ssa_module_init(&s->module, c);
gbFileError err = gb_file_create(&s->output_file, "../examples/test.ll");
if (err != gbFileError_None)
return false;
return true;
}
void ssa_gen_destroy(ssaGen *s) {
ssa_module_destroy(&s->module);
gb_file_close(&s->output_file);
}
void ssa_gen_code(ssaGen *s) {
ssaModule *m = &s->module;
CheckerInfo *info = m->info;
gbAllocator a = m->allocator;
gb_for_array(i, info->entities.entries) {
auto *entry = &info->entities.entries[i];
Entity *e = cast(Entity *)cast(uintptr)entry->key;
DeclarationInfo *decl = entry->value;
String name = e->token.string;
switch (e->kind) {
case Entity_TypeName: {
ssaValue *t = ssa_make_value_type_name(a, e);
map_set(&m->members, hash_string(name), t);
} break;
case Entity_Variable: {
ssaValue *g = ssa_make_value_global(a, e, NULL);
map_set(&m->values, hash_pointer(e), g);
map_set(&m->members, hash_string(name), g);
} break;
case Entity_Procedure: {
ssaValue *p = ssa_make_value_procedure(a, e, decl, m);
map_set(&m->values, hash_pointer(e), p);
map_set(&m->members, hash_string(name), p);
} break;
}
}
gb_for_array(i, m->members.entries) {
auto *entry = &m->members.entries[i];
ssaValue *v = entry->value;
if (v->kind == ssaValue_Procedure)
ssa_build_procedure(v);
}
ssa_print_llvm_ir(&s->output_file, &s->module);
}
#if 0
#include "type.cpp"
#include "ir.cpp"
struct Codegen {
Checker *checker;
gbFile file;
gbAllocator allocator;
irModule module;
ErrorCollector error_collector;
};
b32 init_codegen(Codegen *c, Checker *checker) {
c->checker = checker;
if (c->error_collector.count != 0)
return false;
for (isize i = 0; i < gb_array_count(checker->parser->files); i++) {
AstFile *f = &checker->parser->files[i];
if (f->error_collector.count != 0)
return false;
if (f->tokenizer.error_count != 0)
return false;
}
c->allocator = gb_heap_allocator();
ir_module_init(&c->module, c->checker);
return true;
}
void destroy_codegen(Codegen *c) {
ir_module_destroy(&c->module);
}
b32 is_blank_identifier(AstNode *identifier) {
if (identifier->kind == AstNode_Identifier) {
return are_strings_equal(identifier->identifier.token.string, make_string("_"));
}
return false;
}
irValue *ir_add_basic_block(gbAllocator a, irValue *p, String label) {
irValue *b = ir_make_value_basic_block(a, gb_array_count(p->procedure.blocks), label, p);
gb_array_append(p->procedure.blocks, b);
return b;
}
irValue *ir_emit_from_block(irValue *b, irInstruction *i) {
GB_ASSERT(b->kind == irValue_BasicBlock);
i->block = b;
gb_array_append(b->basic_block.instructions, i);
return ir_make_value_instruction(gb_heap_allocator(), i);
}
irValue *ir_emit(irValue *p, irInstruction *i) {
GB_ASSERT(p->kind == irValue_Procedure);
return ir_emit_from_block(p->procedure.curr_block, i);
}
irInstruction *ir_add_local(irValue *p, Type *type, TokenPos pos) {
irInstruction *i = ir_alloc_instruction(gb_heap_allocator(), irInstruction_Alloca);
i->reg.type = type;
i->reg.pos = pos;
gb_array_append(p->procedure.locals, ir_emit(p, i));
return i;
}
irInstruction *ir_add_named_local(irValue *p, Entity *e) {
irInstruction *i = ir_add_local(p, e->type, e->token.pos);
i->alloca.label = e->token.string;
// map_set(&p->procedure.variables, hash_pointer(e), );
return i;
}
irInstruction *ir_add_local_for_identifier(irValue *p, AstNode *i) {
GB_ASSERT(p->kind == irValue_Procedure);
GB_ASSERT(i->kind == AstNode_Identifier);
auto *found = map_get(&p->procedure.module->checker->definitions, hash_pointer(i));
return ir_add_named_local(p, *found);
}
void ir_build_variable_declaration(irValue *p, AstNode *d) {
GB_ASSERT(p->kind == irValue_Procedure);
auto *vd = &d->variable_declaration;
if (vd->name_count == vd->value_count) {
AstNode *name = vd->name_list;
AstNode *value = vd->value_list;
for (;
name != NULL && value != NULL;
name = name->next, value = value->next) {
if (!is_blank_identifier(name)) {
ir_add_local_for_identifier(p, name);
}
// auto lvalue = build_address(p, name, false);
// build_assignment(p, lvalue, value, true, NULL);
}
} else if (vd->value_count == 0) {
AstNode *name = vd->name_list;
for (;
name != NULL;
name = name->next) {
if (!is_blank_identifier(name)) {
}
// build_assignment(p, )
}
} else {
// TODO(bill): Tuple
}
}
void ir_build_expression(irValue *p, AstNode *e) {
GB_ASSERT(p->kind == irValue_Procedure);
}
void ir_build_statement(irValue *p, AstNode *s);
void ir_build_statement_list(irValue *p, AstNode *list) {
GB_ASSERT(p->kind == irValue_Procedure);
for (AstNode *item = list; item != NULL; item = item->next) {
ir_build_statement(p, item);
}
}
void ir_build_statement(irValue *p, AstNode *s) {
GB_ASSERT(p->kind == irValue_Procedure);
switch (s->kind) {
case AstNode_EmptyStatement:
break;
case AstNode_VariableDeclaration: {
auto *vd = &s->variable_declaration;
if (vd->kind == Declaration_Mutable) {
ir_build_variable_declaration(p, s);
}
} break;
case AstNode_ExpressionStatement:
ir_build_expression(p, s->expression_statement.expression);
break;
case AstNode_BlockStatement:
ir_build_statement_list(p, s->block_statement.list);
break;
}
}
void ir_begin_procedure_body(irValue *p) {
gbAllocator a = gb_heap_allocator();
p->procedure.curr_block = ir_add_basic_block(a, p, make_string("entry"));
map_init(&p->procedure.variables, a);
}
void ir_end_procedure_body(irValue *p) {
p->procedure.curr_block = NULL;
map_destroy(&p->procedure.variables);
}
void ir_build_procedure(irModule *m, irValue *p) {
if (p->procedure.blocks != NULL)
return;
AstNode *proc_type = NULL;
AstNode *body = NULL;
switch (p->procedure.node->kind) {
case AstNode_ProcedureDeclaration:
proc_type = p->procedure.node->procedure_declaration.procedure_type;
body = p->procedure.node->procedure_declaration.body;
break;
case AstNode_ProcedureLiteral:
proc_type = p->procedure.node->procedure_literal.type;
body = p->procedure.node->procedure_literal.body;
break;
default:
return;
}
if (body == NULL) {
// NOTE(bill): External procedure
return;
}
defer (gb_printf("build procedure %.*s\n", LIT(p->procedure.token.string)));
ir_begin_procedure_body(p);
ir_build_statement(p, body);
ir_end_procedure_body(p);
}
void ir_build_proc_decl(irModule *m, AstNode *decl) {
GB_ASSERT(decl != NULL);
auto *pd = &decl->procedure_declaration;
if (is_blank_identifier(pd->name))
return;
Entity *e = entity_of_identifier(m->checker, pd->name);
irValue *p = *map_get(&m->values, hash_pointer(e));
ir_build_procedure(m, p);
}
void generate_code(Codegen *c) {
gbAllocator a = gb_heap_allocator();
ir_module_create(&c->module);
for (isize i = 0; i < gb_array_count(c->module.values.entries); i++) {
irValue *v = c->module.values.entries[i].value;
switch (v->kind) {
case irValue_Procedure:
ir_build_proc_decl(&c->module, v->procedure.node);
break;
}
}
}
#endif